名词性从句2
名词性从句讲解(2)
名词性从句讲解（2 ）应城市第三高级中学刘琪一．表语从句：在复合句中，位于系动词之后作表语的从句叫表语从句。
引导表语从句的关联词与引导主语从句的关联词大致一样，表语从句位于系动词后，有时用as if引导。
1.that 引导表语从句，无词义，只起连接作用，不可省。
2.联系动词可为be,look,seem,sound,appear等。
3.主语可为名词fact,truth,cause,question,explanation,trouble,assumption,belief等，代词this,that,these,it等。
4.whether 引导表语从句The fact is that we have lost the game.That’s just what I want.This is where our problem lies.That is why he didn’t come to the meeting.It looks as if it is going to rain.China is not what it used to be.The question is whether the enemy is marching towards us。
【注意】1.当主语是reason时，表语从句要用that引导而不是because。
The reason why he was late was that he missed the train by one minute this morning.2.whether可引导表语从句，但与之同义的if却通常不用于引导表语从句。
3.That is why…译为“这就是……的原因”。
其中why引导的名词性从句在句中做表语，该句型通常用于针对前面已经说过的原因进行总结。
That is why you see this woman before you know.That is why I came.区别：①That is why ……与That is the reason why …同义，只不过从语法结构上讲，前者中的why引导表语从句，后者中的why引导定语从句。
高中英语真题-名词性从句_2
高中英语真题:名词性从句一、主语从句1．It＋系动词＋形容词(necessary，right，likely，unlikely，wrong，important，certain，clear，obvious，strange，normal等)＋that从句It is certain that most of the farmers have brought in more mo ney by all means.2．It＋be＋名词(短语)(a pity，a shame，good news，a fact，an honour，a wonder，no wonder等)＋that从句It’s no wonder that you’ve achieved so much success.3．It＋be＋过去分词(said，told，heard，reported，decided，suggested，advised，ordered，remembered，thought，considered，wellknown，announced等)＋that从句It is said that the professor has already succeeded in carrying out the experiment.4．It＋特殊动词(seem，appear，happen，matter)＋that从句It happened to me that I had been away when he called.二、宾语从句1．动词的宾语从句有些动词带宾语从句时习惯上需要在宾语从句前加it。
这类动词(词组)有hate，enjoy，like，love，dislike，see to等。
I hate it when they talk with their mouths full.2．一般情况下介词后只能用wh类连接词引导宾语从句。
We are talking about whether we admit students into our club.注意：(1)where引导的从句有时也可用作介词的宾语。
名词性从句(2)
It is important that…重要的是……It is obvious that…很明显……b. It + be + -ed 分词+ that-从句It is believed that…人们相信……It is known to all that…众所周知……It has been decided that…已决定……c. It + be +名词+ that-从句It is common knowledge that………是常识It is a surprise that…令人惊奇的是……It is a fact that…事实是……d. It +不及物动词+ that-从句It appears that…似乎……It happens that…碰巧……It occurred to me that…我突然想起……七、名词性wh-从句1）由wh-词引导的名词从句叫做名词性wh-从句。
Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。
Wh-从句的语法功能除了和that-从句一样外，还可充当介词宾语、宾语补语和间接宾语等，例如：主语：How the book will sell depends on its author. 书销售如何取决于作者本人。
直接宾语：In one's own home one can do what one likes. 在自己家里能够随心所欲。
间接宾语：The club will give whoever wins a prize.俱乐部将给得胜者设奖。
表语：My question is who will take over president of the Foundation. 我的问题是谁将接任该基金会主席职位。
名词性从句讲解(二)
1. We know the truth that the earth goes round the sun.
2. The fact that she had not said anything surprised all of us. 3. They asked me the question whether the work was worth doing. 4. They problem whether it is right or wrong has not yet been decided.
It is
a pity / an hounor a shame one’s duty that – clause no surprise no wonder
It is a pity that we can’t go.
It is no surprise that our team has win the game. It is no wonder that you have achieved so much success.
二、表语从句
1. This was what Tom was looking for.
这是汤姆正在找的东西。
2. That is why she was absent yesterday.
那是她昨天为什么迟到。
3. The house is where Lu Xun once lived.
这个房子是鲁迅曾今住过的地方。
4. This is how we overcame the difficulties.
这就是我们如何克服困难的。
5. The truth is that I have never been there.
名词性从句2
our awareness of environmental protection .
3.His article is very good except ___ there are
only a few unfit sentences.
A.that B./ C .what D.when
考点六 辨别下列从句是定语从句还是同位语从句
Noun Clauses II
翻译以下句子，并指出带下划线的从句属于名词性 从句中的哪一种。 1.What he wants is a book. 主语从句
2.It is so nice that we can learn this grammar point together.
主语从句 宾语从句
(3)表语从句中主语是suggestion, advice, proposal, request, requirement,order, recommendation等表示“建议、请求、要 求、命令”意思的词时, 谓语动词要用虚拟 语气 “(should) +do”。如: His suggestion is that we (should) hold another meeting to discuss the question.
6.That he wants a book is certain. 主语从句
7.I suggested just now we (should) take part 宾语从句 in this activity. 8.Whether you like him or not doesn’t matter too much. 主语从句 9.He doesn’t know whether you can sing it well. 宾语从句 10.The problem is whether you can sing it well. 表语从句 11.The problem whether it is right or wrong has not been decided. 同位语从句 12.Please tell me who your monitor is. 宾语从句
高二英语课件：高二英语名词性从句2
宾语从句
在另一个句子中做宾语的句子 叫宾语从句。
I worry about whether he can pass through the crisis of his illness.
宾语从句
Now I want to know what I can do.
John said that he was leaving for London on Wednesday
形 3)It is+过去分词+that从句
What we need is water What we need are useful books.
It is said(reported, decided…)that… 4)It +不及物动词+that从句 It seems(happened, doesn’t matter, Has turned out,…)that… 5)It is (was) ++that(who) I met John in the street yesterday. It is I who (that) am your true friend
引导名词性从句的连接词
2.连接代词：what, whatever, who, whoever, whom,whose, which.不仅 起到连接一个句子的作用，同时 也是从句的一个组成部分。
3.连接副词：when, where, how, why
引导主语从句不可省略的连词：
1.介词后的连词 2.引导主语从句和同位语从
I should like to know the reason why you changed the plan.
I have no idea when she will be back.
考研英语语法 名词性从句(2)
LECTURE 2 名词性从句本堂目标：熟悉四种名词从句主语从句特征，重点掌握it结构的主语从句与强调句型的区别、宾语从句中的否定后移、名词从句的嵌套结构等，学会快速分析长难句。
基础预习所谓名词性从句，就是把这个句子当作名词使用，并在句子中充当一定的句子成分。
名词性从句一般可在句子中充当主语、宾语、表语和同位语。
于是我们就有了常说的四种名词性从句：主语从句、表语从句、宾语从句和同位语从句。
名词性从句一律都用陈述语气。
【名词性从句总结表】从句引导词连词关系代词关系副词主语从句that, whether,if(不能放句首) what,whatever,who,whoever,whose,whosever,which,whicheverwhen, whenever, where, wherever, how, however,why表语从句that, whether,because, as, asif, as thoughwhen, where, how, why等宾语从句that, whether,if when, whenever, where, wherever, how, however, why同位语从句that, whether一、主语从句主语从句是指作主语的从句，有三种类型：1．由that引导的主语从句that引导的主语从句是最常见的主语从句，但把that从句放在句首是很少见的，只有为了强调或谓语较长时，that从句才放在句首。
一般而言，that从句都借助形式主语it而放在句子后部分去。
复习主语从句时重点注意形式分类常见结构It be+名词+that 从句It is a pity that…可惜的是…It is a fact that…事实是…It is good news that……真实太好了。
It is no wonder that…难怪…It is common knowledge that……是常识。
牛津高中英语模块三Unit1_语法讲解和训练__名词性从句 2
模块三Unit1 语法讲解和训练名词性从句一、概述在句子中起名词作用的从句称为名词性从句。
名词性从句包括主语从句，宾语从句、表语从句和同位语从句。
二、名词性从句的引导词1、连接代词：who, whom, whose, what, which, whoever, whatever等2、连接副词：when, where, why, how等3、从属连词: that, whether, if, as if, because (as if, because 只引导表语从句)连接代词和连接副词在句中不再是疑问词，因而从句中用陈述语序。
三、用法详解（一）主语从句1、主语从句用连接代词、连接副词和从属连词that, whether引导。
that不可省略。
That you don’t like him has nothing to do with me.Whether John can do the experiment remains a question.Who will be sent abroad to further his studies is not announced.What surprised me most was that such a little girl can play the violin so well.2、当主语过长时，常常用it作形式主语，而把真正的主语从句放在主句后面。
常用句型有：1)It +be +形容词（true, possible, certain, likely, surprising, strange, important…）+ that从句It’s certain that she will do well in the exam.It’s likely that he will tell me everything about that night.2)It +be +名词词组（no wonder, an honor, a pity, high time等）+that 从句It’s a pity that he can’t come.It’s high time that you turned in your homework.3)It +be +过去分词（said, reported, expected, supposed等）+that 从句It’s said that he is quite self-confident.It’s reported that a letter from the university has reached him.4)It +seem/ happen/look as if等+that从句tIt seems that Alice is not coming.It happened that I was a witness to the accident.5)It +doesn’t matt er(make no difference)+wh-It doesn’t matter whether you know my name or not.It makes no difference to me where we shall have the meeting.（二）宾语从句1、宾语从句用连接代词、连接副词和从属连词that, whether, if引导。
[5] 英语语法：名词性从句(二)
![[5] 英语语法：名词性从句(二)](https://img.taocdn.com/s3/m/df1ce454336c1eb91a375d80.png)
名词性从句1主系表句型----- be （连系动词do）2、主谓宾----- do（vt）3、主谓----- do(vi)----(不及物动词)4、主谓宾补----do(vt)5、主谓宾宾---do(vt) 记双宾语的动词一定要记。
6、There be (不及物动词do)--------be (不及物动词)宾语从句定义：在主谓宾句型的宾语的位置上把做为名词的宾语扩展成一个be句型或者do句型。
可以用下列公式进行表示：主语+谓语+从句。
宾语从句的连词①that ,②whether(or not)或if;③which(whichever), who(whoever)，whom(whomever) ，whose(whosever)，what(whatever);④when(whenever)，where(wherever)，why，how(however); ⑤how many, how much, how long, how often，how soon宾语从句的形式：1、主谓宾句型的宾语从句:做为名词的宾语扩展成一个be句型或者do句型。
He knows the newsHe knows that the teacher is in classroom2, 主谓宾宾---do(vt) 句型的宾语从句，把直接宾语变为一个be或do句型。
He tells me the newsHe tells the news to meHe tells me that she is a teacherHe tells that she is a teacher to me3、主谓宾补句型的宾语从句需要it来做形式宾语I find Chinese important主谓宾补I find that we make a quick decision about this matter important主谓宾语从句补I find it important that we make a quick decision about this matter主谓形式宾语补宾语从句I think it necessary that we take plenty of hot water every day .我认为每天多喝开水是有必要的.I feel it a pity that I haven’t been to the get-together.我没去聚会,感觉非常遗憾.I have made it a rule that I keep diaries.我每天写日记成了习惯.4、宾语从句的省略形式：某些形容词后面可以带宾语从句，其形式为sb+be+形容词+that宾语从句：这一类形容词通常是表示人物的心理，情感等状态的形容词如：sure,certain,glad,please,happy,sorry,afraid,satisfied,surpriseda. I am glad (that) you helped me.b、I am sure (that) you can pass the exam.表语从句同样的道理，如果在主系表句型表语的位置上把表语变成一个be句型或者do句型，则称为表语从句。
高中英语语法——名词性从句_2
表语 同位语
名词性从句的定义及种类 1. 定义: 在句子中起名词作用的各种从句，统称为名词性从句。 2. 种类: 根据它们在句中所充当的句子成分，可以分为主语从 句、宾语从句、表语从句和同位语从句。
请判断以下哪几句为名词性从句
1.Whether we will go for an outing tomorrow remains unknown. 主语从句 2.The question is when he can arrive at the hotel. 表语从句 3.It was Mary that helped me solve the problem. 强调句 4.Whoever breaks the law will be punished. 主语从句
1. 从属连词: that, if, whether
that: 无词义、不充当从句中的成分，引导第一个宾语从句可省略。 if: 表是否，不充当从句中的成分，引导宾语从句，不可省略。 whether: 表是否，不充当从句中的成分，引导名词性从句，不可省略。
1.__T_h__a_t __we will realize our dreams in the future is certain. 2.The fact is __t_h_a_t_ the Earth goes around the Sun. 3.__W__h_e_t_h_e_rshe will come back on time depends on weather. 4.I asked him __i_f/__w_h_e_t_h_e_r he could do me a favor. 5.Could you tell me the question _w__h_e_t_h_e_r English is useful for us now? 6.Word came ___t_h_a_t_ his son was admitted to Beijing University. 7.The christian Church rejected his theory, saying ___(_th_a_t_)__ it was against God's idea and ___t_h_a_t_ people who supported it would be attacked.
名词性从句 2
同位语从句常用that引导或用连接副词when / where / why / how / whether
1.Two thirds of all girls in Britain are on a diet./ The fact ________________________________________ _______ worries their parents and teachers a lot.
在复合句中起名词作用的从句叫名词从句 (Noun Clauses)。名词从句的功能相当于 名词词组, 它在复合句中能担任主语、宾 语、表语、同位语、介词宾语等，因此根 据它在句中不同的语法功能，名词从句又 可分别称为主语从句、宾语从句、表语从 句和同位语从句。
{What he does is important. {This is what he does every day.
We heard the news last night that the Queen of England was on a three-day visit in China.
3. Teenagers should not spend too much time online./ Many British parents hold ________ the view.
Many British parents hold the view that teenagers shouldn’t spend too much time online.
高二英语名词性从句2
The question whether he will come or not is not settled.
引导名词性从句的三类关联词
1 _____ made the school proud was ____ more than 90% of the students had been admitted to key universities. A What ;because B What ;that
C That ;what
D that; because
3.连接副词（a. 连接 b.做从句中的状语） when/where/why/ how/ how many/how much….
where 1)I don’t know __________ he will go.
2)Can you explain ________you were late this why morning? How/when will come here isn’t decided. 3)__________he
--- Oh,that’s ____. A what makes me feel excited . B whatever I feel excited about
C How I feel about NhomakorabeatD when I feel excited Who ____is waiting for me is my brother.
which ____ book you like best.
名词性从句2
改错:
1. ThIist is natural that they should like each
other.
that
2. It is true∨he has made a very important discovery in chemistry.
whether 3. It doesn’t matter that he is wrong or not.
用it 作形式主语的结构(1)
(1) It is ＋ 名词 ＋ 从句 It is a fact that … It is an honor that It is common knowledge that
(2) It is ＋ 形容词 ＋ 从句 It is natural that… It is strange that…
Who/ whoever/ whomever
1. _W_h_o_ will win the gold medal remains to be seen.
2.W_h_o_e_v_erwants to ask questions is welcome any time.
3. The manager decided to offer the job to w__ho_e_v_erhe believed had a strong sense of duty. 4. _W__ho_m_e_v_e_r you choose as your wife has nothing to do with me.
引导主语从句的关联词有三类： (1) 从属连词that。 如：That they were true sisters
was clear from the facial resemblance between them. 很明显，她们确是亲姐妹，她们的脸型很相似。 (2) 从属连词whether。如： Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。 (3) 连接代词who, whom, whose, what, which,
名词性从句 (2)
主语从句
• 主语从句是在复合句中充当主语的从句，
其功同名词一样。
• 为了避免头重脚轻，常用it作形式主语, 而把真正 主语放在句子末尾。
How the book will sell depends on its author.
引导主语从句的关联词有三类：
The news______________________________ exited the Chinese people.
that typhoon Saomei hit Cangnan
桑美
• The fact__t_h_at_t_h_e_t_yp_h_o_o_n_S_a_n_g_m_e_i_h_i_t C__an_g_n_a_n__ made people worried.
3)The fact that typhoon Saomei hit Cangnan made people worried.
4)The fact that the prices of houses are always increasing made some people angry.
• 同位语从句一般跟在某些名词之 后,用以说明或解释前面的名词, 引导同位语从句的连词常用that.
(1)从属连词that （无意义，不做任何成分） That they were true sisters was clear from the facial resemblance between them.
(2)从属连词whether （不做任何成分，“是否”） Whether he’ll come here isn’t clear.
I have no idea where he has gone. 我不知道他去了哪里。
(完整版)英语名词性从句详解(经典) (2)
Noun Clauses
判断下列是什么从句：
1. Where he was born was unknown to us born.
3. The unknown was where he was born.
4. I don’t know the fact where he was born.
5. He worked where he was born.
6. He worked in the city where he was born.
辨析：宾语从句VS状语从句
I don’t know where he was born.
He worked where he was born.
辨析：定语从句VS同位语从句
I don’t know that she is coming.
The news that China succeeded in sending up a manned spaceship was exciting.
The news that he told us was exciting.
注意：
引导名词性从句的连接词可分为三类：
1．连接词
GO
2．连接代词
GO
3．连接副词
GO
连接词：
BACK
that whether if (一般仅用于宾语从句) as if (用于表语从句)
★ 它们不充当从句的任何成分
连接代词：
what whatever who whoever whom whose which
4. I had no idea whether he will come on time?
名词性从句_2精选全文完整版
①连词3 whether ,that ,if ②连接副词4 when ,where ,why ,how ③连接代词5 what ,which ,who ,whom ,whose ,
！标黄词是定语从句中没有的 ！
1.主语 + 谓语 You jump , I push.
2.主语 + 谓语 + 宾语 I admire you.
3.主语 + 谓语 + (间接)宾语+(直接)宾语 I bought myself a watch. 4.主语 + 谓语 + 宾语 + 宾补 I find English interesting. 5.主语 + 系动词 + 表语 Cindy is a teacher. It sounds great.
名词性从句
宾表主同 语语语位 从从从语 句句句从
句
I believe that comment. n.评论
定义:相当于名词的从句叫做 名词性从句
I believe that Mr Yang is a passionate teacher.
I believe that comment. 宾语(多为名词) I believe that Ms Yang is a passionate teacher.
同位语从句
1.Don't care what is written in your history.
宾从
2.People say I'm crazy and that I am blind.
宾从
第7课 名词性从句 (2)
LESSON SEVEN名词性从句导言英语从句其实就是三个句型的衍生物。
掌握了三个句型就已经掌握了名词性从句。
名词性从句并不难。
只是在我们过去学过的三种基本句型中出现名词的位置上，根据需要将名词扩大成一个句子，并做小小的改动。
也就是说在一个主系表或主谓宾句型中再套上一个主系表或主谓宾的句子而已。
注意中英文表达上的区别▲由连词that、if、whether 引导的名词性从句主语谓语宾语（宾语从句）每个人都知道地球围着太阳运行。
主语状语谓语宾语（宾语从句）●连词主语谓语状语从上面的例句可以看出，宾语从句只是将宾语扩大成一个句子，并用连词that 引导。
因为that 没有实际意思，通常可以省略。
主语（主语从句）系表语地球围着太阳运行是一条真理。
主语（主语从句）●形式主语系表语主语（主语从句）●It is a truth同样的一个句子，当把它放在主语的位置时，我们便称其为主语从句。
但在英语中为了避免句子头重脚轻，通常将主语从句放在句子的后面，并用it 代替其原先的位置，叫做形式主语。
在这种情况下，连词that 通常不省。
表语（表语从句）●从上面的句子可以看出将一个完整的句子置于表语的位置，便称作表语从句。
主语从句、表语从句以及宾语从句在句子中所占的位置是名词的位置，所以称它们为名词性从句。
由连词if、whether引导的名词性从句也是完整的句子，所不同的是that 在句子中没有实际意思，可以省略，而if、whether因为有是否的意思，故不可省略。
●●I wonder注：whether可加or not而if 不能。
有时我们可以将由whether引导的主语从句放在句首，if则不能。
●---Nelson Rockefeller, American businessman不要忘了，世界上最强大的力量是爱情。
--美国实业家洛克菲勒. N.-------Paul Meyer, French linguist经验证明，大部分时间都是被一分钟一分钟地而不是一小时一小时地浪费掉的。
高考英语高频语法串讲：名词性从句2[ 高考]
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名词性从句名词性从句一.概念名词性从句共有四种:主语从句,表语从句,宾语从句和同位语从句二.相关知识点精讲1．主语从句：主语从句在整个句子中作主语。
(1)不同于其它的连词，它不充当句子的成分，只是单纯的连接词，通常不可以省略。
分句置于句首时，that绝对不可以省略。
That the driver could not control his war was obvious.It was obvious that the driver could not control his car.(2)if 不能用在主语从句中，而是用whetherWhether he left (or not) is unknown(3)当主语从句作主语时，谓语动词一般用第三人称单数，下面这个句型例外。
What we need is more time and money.What we need are many more books.2.表语从句：表语从句出现在系动词后，充当表语。
The trouble is that we are short of money.Go and get your coat. It’s where you left it.(1) 引导表语从句除了上述三类词外还有because, as if/ as though等等The reason (why/for which…..) is that ……It/This/That is because……(2) 连系动词“appear, look, seem”的两个常用句型It seems/appears that….It looks/seems as if/as though……(与事实相符用陈述语气，与事实相反用虚拟语气) (3) as 也可以引导表语从句Things are not always as they seem to be3. 宾语从句：及物动词，形容词和介词后加宾语从句作其宾语。
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名词性从句一． 四类名词从句1. 在句子中，名词或名词短语主要充当四种成分：主语、宾语、表语和同位语2. 把句子当作名词来用，分别在另一个句子中做主语、宾语、表语和同位语构成四种从句：主语从句、宾语从句、表语从句和同位语从句。
下面，我们来初步认识一下四种名词性从句的样子。
主语从句The book is interesting.book名词作主语；What I am reading is interesting.完整句what I am reading 作主语，因此被称为主语从句。
该从句有自己的主语（I）和谓语（am reading）， what在主语从句中作am reading的宾语。
宾语从句I believe his words.words作宾语。
I believe what he said.完整句what he said作宾语，因此被称为宾语从句。
该从句有自己的主语（he）和谓语（said），what 在宾语从句中作said的宾语。
表语从句English is a useful tool.a useful tool作表语。
The book is what I want.完整句子what I want作表语，因此被称为表语从句。
该从句有自己的主语（I）和谓语（want），what 在表语从句中作want的宾语。
同位语从句I like the book, Gone with the Wind.Gone with the Wind作book的同位语。
The mother must accept the fact that her baby is deaf.完整句that her baby is deaf作fact的同位语，因此被称为同位语从句。
该从句有自己的主语（her baby）和谓语部分（is deaf），that在同位语从句中不充当成分。
二．三种句子来充当四种成分名词从句的本质——陈述句、一般疑问句或特殊疑问句充当一个句子的某一种成分。
这句是学习名词性从句的精髓，请大家一定切记心中。
先认识一下三种句子吧。
陈述句The Earth is round.That the Earth is round is a fact.陈述句That the Earth is round作主语，构成主语从句。
一般疑问句：Does he need my help?I don’t know if he needs my help.一般疑问句if he needs my help作宾语，构成宾语从句。
特殊疑问句：Where did he go?I don’t know where he went.特殊疑问句作宾语，构成宾语从句。
想要充分理解掌握名词性从句的精髓吗？那就随我一起掌握下面的这个名词性从句过关表吧，它的功用想必看过的人不言自明了。
名词性从句过关表：连词that 对应于陈述句 That在从句中不作成分连词whether, if 对应于一般疑问句whether, if在从句中不作成分连接副词when, where, why, how;连接代词who, whom, what, which, whose 对应于特殊疑问句when, where, why, how作状语；who, whom, what作主语、宾语、表语；which, whose作定语，后面接名词连用。
此表永记心中，保准名词性从句过目不忘。
接下来，我们分别具体了解陈述句、一般疑问句和特殊疑问句是如何充当句子的四种的成分的。
首先来看，陈述句。
三．陈述句充当四种句子成分要在陈述句句首加上that, 然后把“that+陈述句”这一结构分别放在另一个句子的四种位置即构成四种名词从句。
1）主语从句：把“that+陈述句”这一结构放在主语位置即构成主语从句：English is difficult.That English is difficult is not my idea. 有人认为英语很难，我可不这么认为。
主语 谓语部分He doesn’t understand English.That he doesn’t understand English is obvious.他不懂英语，这很显然。
The world is round.That the world is round is a fact. 地球是圆的，这是一基本常识。
The moon itself does not give off light.That the moon itself does not give off light is common knowledge. 月球本身不发光这是一个常识。
更常见的是用it作形式主语置于句首，而将主语从句放在句末。
这种形式在阅读和写作中经常可以看到、用到，所以，请细心掌握哦。
That he doesn’t understand English is obvious. 转化为It is obvious that he doesn’t understand English.That the world is round is a fact.转化为It is a fact that the world is round. That the moon itself does not give off light is common knowledge.转换为It is common knowledge that the moon itself does not give off light.2）宾语从句：把“that+陈述句”这一结构放在宾语位置即构成宾语从句：I think (that) you are right.We know (that) the world is round.现在，我们来看一句蓝色Delta阅读quiz 10中出现的宾语从句，具体感受一下理解语法的实际功用吧。
Most believe that the intense gravitational forces would rip apart the astronauts long before they were crushed at the singularity.大多数人认为，强烈的重力将使宇航员在到达奇点之前就被撕扯开。
记住，只有宾语从句中的that才可以省去，而主语从句、表语从句和同位语从句中that一般不要省去。
3）表语从句：把“that+陈述句”这一结构放在表语的位置即构成表语从句。
My idea is that the child should be sent to school.4）同位语从句：把“that+陈述句”这一结构放在同位语位置即构成同位语从句。
同位语就是为了补充说明名词的成分，当我们用一个完整的陈述句来补充名词时， 即构成同位语从句。
因此同位语从句都是位于一个名词后边，形式上便构成“名词+that+陈述句”。
The fact that he succeeded in the experiment pleased everybody. 他试验取得成功，这让大家很高兴。
that he succeeded in the experiment为同位语从句，具体补充说明the fact。
The rumor that Tom was a thief turned out to be untrue.有人曾谣传Tom是小偷，结果证明是不对的。
that Tom was a thief为同位语从句，具体补充说明the rumor。
阅读文章中，同位语从句经常与所修饰的名词被其他成分隔开。
They spread the lie everywhere that Tom was guilty of theft.他们到处散布谣言说Tom犯有盗窃罪。
同位语从句被状语everywhere分开。
A saying goes that practice makes perfect.俗话说熟能生巧。
同位语从句被谓语goes分开。
四、一般疑问句可充当四种成分1.一般疑问句要变成陈述句，并用whether或if来引导。
1）主语从句：Whether he comes or not makes no difference to me.他来不来对我无所谓。
2）宾语从句I don’t know if/whether he needs my help.She asked whether/if there are any drugstores in this street.3）表语从句My concern is whether he comes or not.我关心的是他到底来不来。
4）同位语从句They are faced with the problem whether they should continue to work.他们面临是否继续干下去这个问题。
2. if还是whether?1）if一般只引导宾语从句，而whether可引导包括宾语从句在内的其他名词从句。
If he comes or not makes no difference.错误，不用if引导主语从句。
The question is if he will come.错误，不用if引导表语从句。
Let us know whether / if you can finish the article before Friday. 请让我们知道你是否能在星期五以前把文章写完。
正确，if只引导宾语从句。
2)if不和or not直接连用，即一般不说if or not。
但可以说if…or not。
而whether没有此限制。
I don’t know if or not he comes.错误，if不能和or not直接连用。
I don’t know whether or not he comes.正确，whether可以和or not直接连用。
五、特殊疑问句可充当四种句子成分1. 特殊疑问句变成陈述句语序。
There arose the question where could we get the loan. 这里我们要把特殊疑问句变换为陈述句where we could因此，句子要写成There arose the question where we could get the loan.现在的问题是我们去哪里弄到这笔贷款。
本句为同位语从句。
同样的，我们看以下两个例子的转换。
I have no idea when will he return.I have no idea when he will return.Why did he refuse to cooperate with us is stilla mystery.Why he refused to cooperate with us is still a mystery2.充当四种成分1）主语从句：What he told you is true.When the meeting is to be held has not yet been decided.Who will chair the meeting has not yet been decided.Why he refused to cooperate with us is stilla mystery.How a person masters his fate is more important than what his fate is.对于一个人来说，重要的是如何掌握自己的命运而不是被动地接受命运。